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在 PHP 中實(shí)現(xiàn) Zookeeper 連接池,你可以使用開(kāi)源庫(kù) php-zookeeper
。以下是一個(gè)簡(jiǎn)單的實(shí)現(xiàn)方式:
php-zookeeper
庫(kù)。你可以使用 Composer 安裝:composer require zookeeper/zookeeper
ZookeeperPool.php
:<?php
use Zookeeper;
class ZookeeperPool
{
private $zk;
private $hosts;
private $pool;
private $maxConnections;
public function __construct($hosts, $maxConnections = 5)
{
$this->hosts = $hosts;
$this->maxConnections = $maxConnections;
$this->pool = [];
}
public function connect()
{
if (empty($this->pool)) {
for ($i = 0; $i < $this->maxConnections; $i++) {
$this->pool[] = $this->createConnection();
}
}
$key = array_rand($this->pool);
return $this->pool[$key];
}
private function createConnection()
{
$zk = new Zookeeper();
$connection = $zk->connect($this->hosts, 3000); // 設(shè)置連接超時(shí)時(shí)間(毫秒)
if (!$connection) {
throw new Exception("Failed to connect to Zookeeper");
}
return $connection;
}
public function releaseConnection($connection)
{
if (is_resource($connection)) {
$key = array_search($connection, $this->pool);
if ($key !== false) {
unset($this->pool[$key]);
}
}
}
public function __destruct()
{
foreach ($this->pool as $connection) {
if (is_resource($connection)) {
$this->releaseConnection($connection);
}
}
}
}
ZookeeperPool
類創(chuàng)建一個(gè)連接池實(shí)例:<?php
require_once 'ZookeeperPool.php';
$hosts = '127.0.0.1:2181'; // Zookeeper 服務(wù)器地址和端口
$maxConnections = 10; // 最大連接數(shù)
$zkPool = new ZookeeperPool($hosts, $maxConnections);
<?php
// 獲取連接
$zk = $zkPool->connect();
// 使用連接操作 Zookeeper
// ...
// 釋放連接
$zkPool->releaseConnection($zk);
這樣,你就實(shí)現(xiàn)了一個(gè)簡(jiǎn)單的 Zookeeper 連接池。你可以根據(jù)需要調(diào)整連接池的大小和連接超時(shí)時(shí)間。
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